4		2	6
	2
6		1
			6		4
				3
	6	4		2

Difficulty: Very hard (0)

		4
			2	3	1
2	5
				6	3
1	6	2
			4

Difficulty: Super easy (0)

2				1
		5
				4
	5
			5
	3				6

Difficulty: Easy (0)

	2	1
	3
6			5
		6			2
				6
			2	4

Difficulty: Very easy (0)